19984551

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 28892160

約数和(自身を除く): 8907609

約数列:

[1, 3, 37, 43, 53, 79, 111, 129, 159, 237, 1591, 1961, 2279, 2923, 3397, 4187, 4773, 5883, 6837, 8769, 10191, 12561, 84323, 125689, 154919, 180041, 252969, 377067, 464757, 540123, 6661517, 19984551]

約数ペア:

[(1, 19984551), (3, 6661517), (37, 540123), (43, 464757), (53, 377067), (79, 252969), (111, 180041), (129, 154919), (159, 125689), (237, 84323), (1591, 12561), (1961, 10191), (2279, 8769), (2923, 6837), (3397, 5883), (4187, 4773)]